Riveting jack



Jan. 9, 1934. J. E. TRAINER 1,942,785

RIVETING JACK Filed July 50. 1928 2 Sheets-Sheet l INVENTOR ATTORNEYS.

Jan. 9, 1934. J. E. TRAINER 7 1,942,785

RIVETING JACK Filed July 30, 1928 2 Sheets-Sheet 2 INVENTOR ATTORNEYS.

Patented Jan. 9, 1934 is zgss RIVETING JACK James E. Trainer, Barberton, Ohio, assignor to The Babcock & Wilcox Company, Bayonne, N. J., a corporation of New Jersey Application July 30, 1928'. Serial Ne. 296,223

8 Claims. (01. 7853.5)

This invention relates to a novel and improved jack for use in driving rivets. The invention and its objects will be best understood from the following description, when read in connection with the accompanying drawings, in which I have shown a selected embodiment of the invention and in which:-

Fig. 1 is a longitudinal sectional view through a portion of a drum having the jack in position.

Fig. 2 is a view taken from the left of Fig. 1, but omitting the valve and hose.

The invention finds particular utility in connection with high pressure drums of substantial length. It is desirable to rivet drums, particularly drums of this character, with hydraulic machines, but with drums of great length it is diflicult to use such machines. The jack forming the subject matter of this application is particularly designed for use with a hydraulic riveting machine on a boiler drum, and will be described in connection therewith.

, In the drawings, I have shown a'base 1 upon which is a base platen 2 forming parts of a hydraulic riveting machine, and diametrically opposite the base platen is a riveting die 3 on the same machine. The die 3 is operated by hydraulic pressure exerted on the die from the cyl= inder 4. The other parts of the hydraulic ma chine are of usual construction, and need not be shown for the purpose of illustrating my invention.

Disposed between the platen and rivet die and resting upon the platen, is a drum here shown as having a lap joint which connects two parts 5 and 6 of the drum, and which are to be riveted together at the joint '7. Extending diametrically across the drum is a strut which is shown as being expansible, and which has at one end a rivet die 8 adapted to cooperate with the die 3 to set a rivet 9. The strut is made expansible, according to the illustrated embodiment, by being formed as two rams 10 and 11. These rams slide in sleeves 12 which are secured to a block 13 extending longitudinally of the drum.

Extending longitudinally of the drum and secured to the block 13, is a pair of cylinders 14 and 15. These cylinders are revolubly supported in bearings 16 on blocks 17, these blocks being provided with a plurality of legs 18. In this embodiment the legs are shown as three in number, thus forming with the block a tripod. The legs of the tripod are each provided with adjusting means indicated at 19, whereby the bearings 16 may be centered in the drum.

The ram 11 is provided at its lower end with a foot 20 contacting with a stool 21 which rests in the drum directly above the platen 2. This stool is preferably made of such form as to clear the heads of the rivets in the joint, as plainly shown in the drawings. Disposed between the ram 11 and the head 22 of the sleeve 12, is a spring 23 adapted to lift the foot 20.

Disposed between the two rams is a wedge 24, whose faces contact with correspondingly inclined ends 25 and 26 on the rams 10 and 11 respectively. The opposite ends of the wedge extend into the cylinders'l l and 15 respectively, and these ends are connected to pistons 27, and 28 slidably mounted in saidcylinders. Fluid pressure such as compressed air, may be supplied to the cylinders from any suitable source, through a hose 29'. This hose leads to a valve 30 which is connected to the cylinder 14 by the pipe 31, and to the cylinder 15 by the hose 32. Operation of the handle 33.0f-the valve will cause admission of the compressed air to one cylinder, at the same time that it is being exhausted from the other. The details of the valve are not shown, as any suitable valve or valves may be employed.

In operation, the drum is placed with thejoint 89 which is to be rivetedv in correct relation with respect to the riveting machine, the drum resting on the base platen and the hole to be riveted being disposed beneath the rivet die on themachine. The jack isthen inserted in the drum with the cylinders centered substantially on the longitudinal axis of the drum, and the strut is expanded to the position shown, in the drawings, by operation of the valve handle 33. This operation causes the air to exhaust from the cylinder 14, and introduces compressed air into the cylinder 15, thus causing the wedge to be moved to the position shown in Fig. 1. There is sufiicient clearance between the wedge and the sleeves 12 to permit air to be exhausted from one cylinder into the other. This movement of the wedge forces the rams 10 and 11 outwardly to the positions shown, wherein the foot 20 engages the stool 21 and the rivet die 8 engages the head of the rivet 9 which is to be set in the joint 7. The machine is then operated in the usual manner, to bring the die 3 into engagement with the rivet and set it in the joint. During this operation it will be seen that the force exerted by the machine is transmitted through the strut, thus relieving the drum of all strain from this force.

The valve is again operated, this time to cause the air to exhaust from the cylinder15 and to introduce compressed air into the cylinder 14. This will cause movement of the wedge to the right in Fig. 1, and the spring 23 will retract the ram 11 while the ram 10 will retract of its own weight as the wedge is withdrawn.

The drum may then be rotated to bring the next rivet hole in the joint into a position beneath the rivet die 3. During this movement, the tripod legs 18 will revolve with the drum carrying the entire jack therewith. After the hot rivet has been set in the next hole, then the cylinders 14 and 15 may be turned in the bearings 16 to bring the strut into proper position with the rivet die 8 engaging the head of the hot rivet. The cycles of operation are then repeated.

I claim:

1. In a device for riveting a drum, an expansible strut disposed in said drum and comprising two rams, one of said rams having a rivet die, a wedge between the adjacent ends of said rams, pistons connected to opposite ends of said wedge and moving in cylinders, and means to operate the pistons to move the wedge in opposite directions.

2. In a device for riveting a drum riveted together, an expansible strut disposed in said drum and comprising two rams, one of said rams having a rivet die, a wedge between the adjacent ends of said rams, cylinders extending in opposite directions from the rams and containing pistons connected to opposite ends of said wedge,

means to operate said pistons to move the wedge in opposite directions, and means to support said cylinders substantially on the longitudinal axis of the drum.

3. In a device for riveting a drum, a plurality of supports spaced longitudinally of the drum and disposed inside thereof, a bearing on each of said supports, means to center said bearings in said drum, cylinders revolubly mounted in said bearings, an expansible strut disposed between said bearings, pistons in said cylinders and adapted to expand said strut and to permit retraction thereof, and means to operate said pistons in unison.

4. In a device for riveting a drum, a hydraulic riveting machine having a base platen upon which said drum may rest and a rivet die disposed diametrically opposite said platen, and expansible strut disposed inside said drum and comprising two rams, one of said rams having a rivet die adapted to cooperate with the die on the riveting machine, a stool disposed inside the drum above the platen and contacting with the other ram, a wedge extending longitudinally of the drum and adapted to force said rams in opposite directions to form a rigid strut extending diametrically across the drum, pistons connected to opposite ends of said wedge, cylinders receiving said pistons and disposed substantially in the center of said drum, tripods revolubly supporting said cylinders, and means to operate said pistons.

5. In a device for riveting a drum, a diametrically disposed expansible strut within said drum and comprising two rams, one of said rams having a rivet die, means to force said rams in opposite directions including a wedge extending longitudinally of the drum and contacting with adjacent ends of said rams, a piston connected to said wedge, hydraulic means to operate said piston including a cylinder in which the piston moves, and means to rotatably support said piston within the drum.

6. In a device for riveting a drum, a diametrically disposed expansible strut within said drum and comprising two rams, one of said rams having a rivet die, means to force said rams in oppo site directions including a wedge extending longitudinally of the drum and contacting with adjacent ends of said rams, hydraulically operated means for actuating said wedge in both directions longitudinally of the drum, and means for rotatably supporting said rams and the associated wedge.

7. In a device forriveting a drum, a diametrically disposed expansible strut within said drum and comprising two rams, one of said rams having a rivet die, means to rotatably support said strut within said drum and disposed on opposite sides of said strut, and means movable lengthwise of the drum to expand said strut by relative movement of the rams diametrically of the drum.

8. In a device for riveting a drum, a plurality of supports spaced longitudinally of the drum and disposed inside thereof, a bearing on each of said supports, means to center said bearings in said drum, an expansible strut disposed between said bearings and extending transversely of the drum, means for supporting said strut in said bearings, a cylinder supported by one of said bearings and extending lengthwise of the drum, a piston in said cylinder and adapted to expand said strut and to permit retraction thereof, and means to operate said piston. 3

JAMES E. TRAINER.

CERTEFECATE 6F EGRREGTIQNQ Paieni No 1,942,785. January 9, 1934;.

JAMES E. TRAINER.

i is hereby certified that error appears in the printed specification of the above numbered eaten: requiring correction as follows: Page 2, lines 23 and 24-, claim 2, strike out the words "riveted together"; and that the said Lettecs Fat-ant should be read with this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 13th day of March, A. D. 1934.

F. M. Hopkins (Seal) Acting Commissioner 0E Patents 

